Korth Kristalle GmbH
 
 

BK7

65 40 113 BK7 window 13 mm ø x 2 mm optically polished
65 42 390 BK7 wedge window, 10° 50 mm x 20 mm x 3 mm optically polished
65 80 517a BK7 cylindrical lens ø 15,5 -0,1 mm x 3 mm R = 59 +/-1 optically polished,